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| US 1st Army | |
|---|---|
| Unit name | First United States Army |
| Caption | Shoulder sleeve insignia |
| Dates | 1918–present |
| Country | United States |
| Branch | United States Army |
| Type | Field army |
| Role | Operational command |
| Garrison | Fort Cavazos |
| Notable commanders | John J. Pershing; George S. Patton; Courtney Hodges; Omar Bradley |
US 1st Army The First United States Army is a numbered field army of the United States Army established in 1918 that has served in major conflicts including World War I, World War II, and postwar operations, and continues to oversee training and readiness for formations across the United States. Its commanders have included figures such as John J. Pershing, Omar Bradley, George S. Patton, and Courtney Hodges, and the formation has been based at posts including Fort Jay, Fort Meade, Fort Belvoir, and Fort Cavazos. The headquarters has coordinated large-scale operations in theaters such as the Western Front (World War I), the European Theater of World War II, and during Cold War tensions with deployments tied to NATO and continental defense organizations.
The army was organized in 1918 during the First World War as part of the American Expeditionary Forces under John J. Pershing, then demobilized and reconstituted during interwar reorganizations tied to the National Defense Act of 1920 and posts including Fort Jay and Fort Meade, later expanding for World War II under commanders such as Omar Bradley and George S. Patton. During the interwar period the formation participated in training reforms influenced by leaders like Douglas MacArthur and doctrines debated in institutions such as the Army War College and the Infantry School (United States Army). In World War II the army played a central role in operations connected to the D-Day landings, the Normandy campaign, the Battle of the Bulge, and the advance into Germany (1933–1945), coordinating corps-level commands and allied formations including elements from the United Kingdom, Canada, and Free French Forces. Postwar, its responsibilities shifted in the context of NATO commitments, continental defense under the Continental Army Command, and later responsibilities for mobilization and training during operations such as Operation Desert Shield and support for the Global War on Terrorism.
The command has typically comprised multiple corps and subordinate divisions including formations like I Corps, XVIII Airborne Corps, and numbered infantry and armored divisions drawn from institutions such as the United States Army Reserve and the Army National Guard, coordinated through staffs trained at the Command and General Staff College and overseen by senior officers confirmed by the United States Senate. Its structure has integrated functional directorates such as G-1 (personnel), G-3 (operations), and G-4 (logistics) reflecting practices from the War Department and later the Department of the Army, with liaison relationships to joint commands like United States Northern Command and federal agencies including the Federal Emergency Management Agency. Command billets have been held by generals who attended schools such as the National War College and served in joint assignments at commands like United States European Command and United States Central Command.
Activated during the late stages of World War I on the Western Front (World War I), the army supervised American operations in sectors that interacted with armies of the British Expeditionary Force and the French Army (Third Republic), operating under the strategic framework established at conferences such as the Paris Peace Conference (1919). After demobilization it was reshaped by legislation like the National Defense Act of 1920 and by professionalization efforts associated with the Army War College and leaders such as Douglas MacArthur, participating in maneuvers and doctrinal debates at locations including Fort Benning and Fort Leavenworth. Interwar planning anticipated large-scale mobilization managed through entities like the General Staff of the Army and reserve systems linked to the Selective Service System.
Reactivated and expanded for World War II, the formation commanded corps and divisions during campaigns that included the Normandy campaign, the Northern France campaign, the Rhineland campaign, and the drive into Central Europe. It coordinated amphibious operations related to the Operation Overlord landings and subsequent breakout operations involving units such as the 82nd Airborne Division, 101st Airborne Division, 4th Infantry Division, and armored divisions, working in concert with allied headquarters including Supreme Headquarters Allied Expeditionary Force and leaders like Dwight D. Eisenhower and Bernard Montgomery. The army adapted to combined arms concepts advanced by proponents like Leslie McNair and logistically supported operations through networks tied to the Red Ball Express and depots at places such as Le Havre and Cherbourg.
During the Cold War the army’s focus shifted to mobilization, continental defense, and support for NATO posture, interacting with commands such as Allied Command Europe and stateside structures like Continental Army Command and U.S. Army Forces Command. It oversaw training and readiness during crises including the Berlin Crisis of 1961, the Dominican Civil War intervention, and force preparations for operations like Operation Desert Shield and Operation Desert Storm, while integrating reserve components from the Army National Guard and the United States Army Reserve. The headquarters also contributed to homeland defense planning alongside agencies such as the Department of Homeland Security after the September 11 attacks.
In the twenty-first century the army serves as the Army’s preeminent formation for training, mobilization, and readiness, coordinating exercises with partners such as Canada, Mexico, and United Kingdom forces, and supporting deployments to theaters overseen by United States Central Command and United States European Command. It administers mobilization of personnel into operational units, conducts large-scale readiness exercises like those at Joint Readiness Training Center and National Training Center, and implements reforms from initiatives authored by leaders in forums such as the Army Training and Doctrine Command and the Office of the Secretary of the Army. The headquarters has relocated and consolidated at posts including Fort Cavazos while integrating capabilities tied to modern concepts like multi-domain operations advocated by offices of the Army Futures Command.
The formation’s shoulder sleeve insignia and Distinctive Unit Insignia reflect lineage celebrated in decorations awarded by authorities including the Department of the Army and include campaign streamers from engagements such as Normandy, Northern France, the Rhineland, and the Central Europe campaign; individual commanders have received honors such as the Distinguished Service Medal (United States), the Silver Star, and international recognitions conferred by governments like France and the United Kingdom. The army’s heraldry is managed through institutions such as The Institute of Heraldry and its lineage recorded by the Center of Military History.
Category:United States Army field armies